April domestic paint patent express 1

Fast curing intumescent coating composition

Publication number: CN110945088A

Public Day: 2020-03-31

Patentee: PPG Coatings Europe LLC

Abstract: The present invention relates to an intumescent coating composition comprising: (a) a multi-epoxy functional compound; (b) a β- (meth) Acrylic Acid β-containing multiple β-hydroxy (meth) acrylate groups Hydroxyester; (c) compounds with multiple functional groups that are reactive with the following groups: the epoxy group of the polyepoxy functional compound (a) and those containing multiple β-hydroxy (meth) acrylate groups ( (Meth) acrylate groups of β-hydroxy esters of meth) acrylic acid; and (d) compounds that provide an expanding gas upon thermal decomposition; wherein compounds (a) to (d) are different from each other, which involves A method of coating a substrate with a coating composition and involving a substrate at least partially coated with a coating deposited from the intumescent coating composition.

Polyimide varnish and its manufacturing method

Publication number: CN110945079A

Public Day: 2020-03-31

Patentee: Asahi Kasei Corporation

Abstract: An object of the present invention is to provide a polyimide film with high transparency and improved bending resistance against multiple bending, and a varnish capable of providing the polyimide film. The varnish of the present invention contains a polymer (α) and a solvent (β). The polymer (α) is a polyimide or a polyimide precursor. The above-mentioned varnish further contains at least one metal element having a main group metal element with an atomic weight of 26 or more and 201 or less, or an atomic weight of 26 or more and 201 or less, except for alkali metals and alkaline earth metals. At least one of the metal elements contained in the varnish is present in an amount of 0.05 to 500 ppm relative to the polymer (α).

Method for improving antibacterial property of polyurethane coating by using hydrophilic chain extender

Publication number: CN110938359A

Public Day: 2020-03-31

Patentee: Tianjin University

Abstract: The present invention discloses a method for improving the antibacterial performance of polyurethane coatings by using a hydrophilic chain extender, using polytetrahydrofurandiol as the soft segment, isophorone diisocyanate as the hard segment, dibutyltin dilaurate as the catalyst, and N-A Diethanolamine is a hydrophilic chain extender. Adjust the content of the hydrophilic chain extender. After neutralization with glacial acetic acid, emulsify the aqueous solution containing antibacterial agent to obtain polyurethane antibacterial paint with different hydrophilicity. The invention overcomes the deficiencies of the prior art and obtains a method for controlling the antibacterial performance of cationic waterborne polyurethane coating without increasing the content of antibacterial agent, which can improve the antibacterial ability of the coating and reduce the amount of antibacterial agent used.

Wet touch wet high performance waterborne polyurethane topcoat and preparation method thereof

Publication number: CN110938363A

Public Day: 2020-03-31

Patentee: Jiangsu Jiunuo Building Material Technology Co., Ltd.

Abstract: The present invention relates to the technical field of topcoats, in particular to a wet-impact wet high-performance waterborne polyurethane topcoat and a preparation method thereof, including component A and component B. The percentage composition of component A is as follows: Hydroxy acrylic resin A50% ‑60%, polyester resin B10% ‑15%, titanium dioxide 10% ‑15%, carbon black 1% ‑3%, dispersant 1% ‑1.5%, substrate wetting agent 2% ‑ 10%, defoamer 2% -6%, deionized water 8% -18%; the present invention uses a hydroxyacrylic dispersion resin with a hydroxyl content of 3.0 as the main film-forming substance, and the resin with a hydroxyl value content is relatively high-hydroxy resin In terms of excellent flexibility, the drying speed is relatively fast, which can meet the requirements of off-line drying. At the same time, the cross-linking density of the resin with the hydroxyl value content can ensure that the paint film meets the requirements of customers on chemical-resistant media. Choose water-based polyester Used as a system wetting agent, not only wetting the pigments in the system, but also playing a good role on the substrate, reducing the surface tension under wet film conditions, making the liquid coating with better leveling and permeability With defoaming.

Ultra-fast drying epoxy primer and preparation method thereof

Public number: CN108047892B

Public Day: 2020-03-31

Patentee: ACTO High-tech Materials Co., Ltd.

Abstract: The present invention discloses an ultra-fast drying epoxy primer and its preparation method. The ultra-fast drying epoxy primer is obtained by mixing the two components A and B in a mass ratio of 5: 1, wherein the component A includes an elastomer-modified epoxy resin 15-30 (parts by weight) and a coupling agent 1- 3 (parts by weight), dispersant 0.1 to 0.6 (parts by weight), anti-settling agent 0.2 to 0.8 (parts by weight), co-solvent 10 to 20 (parts by weight) and pigments and fillers 23.2 to 80.5 (parts by weight); component B It includes 20-50 parts by weight of curing agent, 1-3 parts by weight of adhesion promoter and 20-50 parts by weight of co-solvent. It can be polished after 2h of spraying, and the putty can be scraped off after polishing, and there will be no bottom biting phenomenon; the primer has excellent adhesion. On the premise that the substrate is not polished, it is suitable for zinc plates, steel plates, and aluminum plates. Adhesion reaches level 0‑1; at the same time has good resistance to water and salt spray corrosion; adhesion to putty reaches 6.5‑8.3Mpa.